6000 miles from CA to the Caribbean? Not on this planet! 6000 miles
from your QTH in CA reaches to the Eastern tip of Brazil and a tad
beyond.
Try again with your distance measure.
I agree with Guy's tome.
73
Don
N8DE
Quoting Guy Molinari <guy_molinari@hotmail.com>:
>
> It all depends on the terrain surrounding your station Bob. HFTA
> takes your terrain profile and provides a "figure of merit" given
> your antenna gain and height. You can move the antenna height
> until you find the optimum result given these factors as well as the
> incoming/outgoing angles to the targeted area. In this case it is
> the Carribean.
>
> So, bottom line. Use the MicroDem and other tools to get your
> terrain profile. That is the hard part. The rest is easy.
>
> 73,
> Guy N7ZG
>
>
>> From: k6uj@pacbell.net
>> Date: Thu, 1 Mar 2012 16:45:43 -0800
>> To: towertalk@contesting.com
>> Subject: [TowerTalk] 15 meter yagi height for 6000 miles
>>
>>
>> Has anyone used the HFTA program and can tell me the best height
>> for a 15 meter yagi for 6000 miles.
>> Assuming there aren't any hills obscuring the take off angle.
>>
>> The carribean is about 6000 miles from my qth and from
>> experimenting I have noticed that lowering the beam
>> down from 90 feet down to 50 feet it is markedly better for 15 meters.
>>
>> I just bought the new antenna handbook and plan to dive in and
>> learn how to do the HFTA myself but was
>> hoping someone else had an idea of the best take off angle angle
>> for 6000 miles on 15.
>> I believe 50 feet is about 3/4 wavelength high and gives me a 20
>> degree takeoff angle on 15.
>> Hope this all makes sense, hihi.
>>
>> Bob
>> K6UJ
>> _______________________________________________
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